at what wattage rms is it usually found alternator and new batteries may be required. im considering three setups and one of them is a xxx which is 1600rms. ill be buying the amp to match whatever i get. the other option is 2 SEs which will only be 1200rms. so im thinkin its possible that the 2 ses wont need all the $$ in electrical upgrades cost close to the same and hit harder but will take a bigger box. thanks alot cus im not that seriously into it that i wanna go spend an extra $500 to upgrade the alt and batt and big 3. maybe big 3 or batt but i jus would rather not go that far. thanks.